Sterilizing attachment for water-supply pipes



W. S. BACHMAN. STERILIZING ATTACHMENT FOR WATER SUPPLY PIPES.

APPLICATION FILED JAN- !2, I922.

Patented Nov. 141, 1922;

Patented Nov. 14, 1922.

came stares WALTER SQBACHMAN, OF CHICAGO, ILLINOIS.

STERILIZING ATTACHMENT FOR \VATER-SUPPLY PIPES.

' Application filed January 12, 1922; Serial No. 528,875.

To all whom it'may concern: 1

Be it knownthat I, WVALTER S. BAGHMAN, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new anduseful Improvements in sterilizing Attachments for Water-Supply Pipes; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in sterilizing attachments for water supply pipes and consists of the matters hereinafter described and more particularly pointed out in the appended claims.

The object of the invention is to provide an improved construction for a sterilizing attachment such as is illustrated and described in U. S. Patent No. 1,321,586 granted to me on October 16,1919.

The advantage of the present invention will more fully appear as I proceed with my specification.

In the drawings Fig. 1 is a view in side elevation of my improved sterilizing attachment, interposed in a water pipe used in connectionwith a drinking water filter.

improved sterilizing attachment.

F ig. 2' is a vertical section through my improved sterilizing attachment on an enlarged scale, the plane of thesection being indicated by the line 2-2 of Fig. 1.

Fig. 3 is a view similar to that shown in Fig. 2 with oneof the parts shown in a changed relation. a I

Fig. 4 is a horizontal section through the attachment in a plane indicated by the line l4 of Fig. 2.

Referring now in detail to'that embodiment of my invention illustrated in the accompanying drawings: 5 indicates a water supply pipe and 6 indicates as a whole, my As shown herein, the pipe 5 supplies Water to a filter 7 for rendering the water fit for drinking purposes, but as is apparent, the invention is not limited touse inconnection with a drinking water filter, since it may be used in other places where its peculiar characteristics make it advantageous to do so. The outlet from the pipe 5 is controlled by a faucet 8 through which the water flows after passing through the filter.

My improved sterilizing attachment 6 includes an upright tubular, non-corrosive metal casing 9, which as shown is of a height greater than its diameter. Said. casing is closed at-its ends by top and bottom screw threaded caps 10 and 11 respectively, the bottom cap preferably being conical or funnel-shaped in vertical section. "The cap 10 has threaded'into it a part 5 ofthe pipe 5, while thebottom cap 11 has threaded into it the other part 5 of the pipe 5, which con nec-ts ,the interior of the casing 9 with the interior of the filter 7. In the pipe part 5 is provided a union fitting'12' and above the same a shut off valve 13, the purposes of which will presently appear.

Concentrically within the casing and rest ing upon the funnel shaped bottom wall of the bottom cap 11 is a tubular vessel 1 1 providing the container for a sterilizing agent, for example, a solution containing active chlorine. This vessel or container is preferably made of glass and is of a diameter somewhat less than that of the casing so as to leave an annular space 15 between it and the casing 9. Said container is held in proper spaced relation within the casing by means of radially spaced, inwardly extend ing lugs 9 arranged near the top and bottom ends of the casing.

The bottom end of the container 11 is provided with a plurality of annularly spaced lugs 16 which depend below the integral bottom wall 17 of the container and bear upon theconical or funnel shaped bottom wall of the cap 11. The spaces or notches 16 between said lugs 16, serve to connect the annular space 15 about the container with the space within the cap 11 below the container and thus with the pipe part 5 connected with said cap. In the bottom wall 17, preferably in the vertical plane of the axis of the container, is provided a conical depression or recess 18 which includes a central depending boss 19 having a vertical hole or opening 20 of small diameter which provides an outlet for the container. The recess 18 is adapted to receive and hold a wad 21 0f asbestos which acts to catch any sediment or solids discharged with the sterilizing agent, and thus prevent a building ter.andsaidsterilizing agentare kept sepa;

member in the form of an elongated waterproofbag 22, preferably made of rubber and closed at one end 23 and open at its. other. end 24:. Said rubber bag is of a diameter.

approximating the inside diameter of the container and of a length approximating the height of said container. The closed end 23 is inserted into the container while the open end 24 is folded over the top end of said container,- said folded-over part engaging about the. outside surface of the top end of the container. and .being removably attached thereto, watertight, by means of elastic bands-or securing devices 25 which pass around the said folded-over part and top end ofthe container .14.

Theoperation of my improved sterilizing device is as follows; The container 14% is first .charged. with .a sterilizing agent :and inorder-to do; this, it is removed from the casing 9- by unscrewing the top cap 10 therefrom,.whereupon the containerle may be Withdrawn vertically from the casing; The.

flowof Water. during. the. attachment of the sterilizing device.

then the. container has thus been. charged, the. waterproof .or rubber bag 22. will lay infolds, upon-the top. of the sterilizing agent at the top end of the container. hen the valve 1-3 is again opened, water will enter and fill the. casing, 9 and surroundthe con.- ta-iner l4 and. will tend to. enter. thecontainer and thus, exertitspressure upon thev rubber-baga-nd consequently upon the top end. of the column of sterilizing agent in the container, untilthe. normal pressure in the pipe.5 isattained both inside and outside of the. container- Thus. a. pressure balance is impartedto the, body of the sterilizing agent.

through saidbag andthehole in the bottom endof. the. container. This pressure. will i of.

course maintainthrough the pipe part 5 and filter 7 downto the faucet 8. The warated, from eachgother byv the. bag andthus thereocan be..no mixing of the water and.

sterilizing agent at. this. end of the con tainer,-which of. course would act to dilute the agent.

When the faucet 8 is opened, a differential pressure willbe started at both top and bot tom of the container and in addition,- the water in the .casing 9, flowing through the spaces 16. on the way to the faucet 8 will set upan aspirating action which will tend to draw or suck the liquid in the container, out through the asbestosstrainer 21 and hole 20 in the bottom end of said container. As a result a minute quantity of the sterilizing agent is drawn out of the container and mixed with the Water fiowingon its .wayto the faucet, the amount taken from said container being accommodated. for by. .the. rub.- ber bag, which readily .unfoldsi or. vdistends: itself to takecare oftheletvehinthe cons. tainer, no .matter. what. the same. may .be,;.as. shown in Fig. 3.

WVith thefaucet open, the avaterpressure on the bag Will'force .solneiof the. sterilizing. agent out of the containenand. as ,.-so.0n.as.. the. faucet. is closed, the. pressure becomes. balanced on each end of theucolumn of agent so that the discharge of said agent will cease, with the flow of water from tl1e .casing.9to-' .wardsithe faucet 8. Thus when the faucet 8 opened, .the differential pressure member or,.bag 22 is active to discharge...theagent and as soon as the faucet isagainclosed, said differential. pressure member or bag immediately becomes. inactive...

The opening 204s madeiof such smallwcrosssection that but-a smallquantity of steri liz,-.

ing agent is introduced -intothe water .each;

' time the .faucetB is opened, said amolnitbe ing so. small. that it. will bareliy effect the taste of the water even when the usnal; and .100

preferred sterilizing agent conta-iningfree chlorine isused... Vhena filter 013- the .kin escribed i used, i any. e idence of hlo ine will be entirey elimin ted-.-

By the use of the asbestos, strainer, the solids. or sediments. .iI1.;-th e, sterilizing agent are caught before theycan enter the minute discharge opening 20,.thus ,said-gsolids oiy sediments cannot ,build, up a .deposit about. the ends. of said op. ning, as: would, tendto h k or stop up .saidiopening.

The advantages of the improvedconstruction. are app L.. i'.ent. v Thesterilizing. agent cannot be om di uted-f net. can. the discharge. opening become clogged so as to impair the.

1 intended operationof-the attachment;- Said attachment operates automatically to. dis.-

harge a small quantity .of, the sterilizing agent e ch ime t efaucet s open d, 1. mi k;

ter what the level; ofthe sterilizing,agent maybein the, container Sa d. conta ner i a i y movedf r. lingi- Witheut loss of the. sterilizing agent and may be readily; cl- T rainer may also be easily r 2 newed.

lVhile in describing-my invention, I have referred to the, same .as, used, in. connection with a fi teror; rinkins ter purposes and I. have referred to certain'specific details of construction, I do not, limit myself v thereto"enceptiasm ay be pointed out in the appended claims.

I claim 'as 'my' invention:

1. A sterilizing attachment for water supply'pipes, comprising a casing adapted to be interposed in a water supply line and to form a part thereof, meansproviding 'a container within the casing for a sterilizing agent, while at the same time permitting a free flow of water through said casing about the container, which has a small discharge opening at one end, a differential pressure member associated with the other end of the container for keeping the sterilizing agent separate from the water in the casing, said member being active under the pressure of the water when flowing through the casing to discharge a part of the sterilizing agent out through the discharge opening of the container into said water.

2. A sterilizing attachment for water supply pipes, comprising a casing adapted to be interposed in a water supply line and to form a part thereof, means providing a container within the casing for a sterilizing agent, while at the same time permitting a free flow of water through said casing about the container, which has a small discharge opening at one end, a differential pressure member associated with the other end of the container for keeping the sterilizing agent separate from the water in the casing, said member being active under the pressure of the water when flowing through the easing to discharge a part of the sterilizing agent out through the discharge opening of the container into said water, but being inactive to discharge said agent when no water is flowing through said casing.

A sterilizing attachment for water supply pipes, comprising a casing adapted to be interposed in a water supply line and to form a part thereof, means providing a container within the casing for a sterilizing agent, while at the same time permitting a free flow of water through said casing about the container, which has a small discharge opening at its bottom end, a differential pressure member in the top end of said container capable of being-acted upon by the water pressure when a flow of water is set up through the casing, to force a part of the sterilizing agent out through said discharge opening into said water, said member keeping the sterilizing agent separated from the water at the top end of the casing.

4r. A sterilizing attachment for water supply pipes, comprising a casing adapted to be interposed in a water supply line and to form a part thereof, means providing a container within the casing for a sterilizing agent, while at the same time permitting a free flow of water through said casing about the container, which has a small discharge opening at its bottom end, means associated with the'top endof the container which is influenced by the water pressure to discharge a part of the sterilizing agent out through the discharge opening, said means keeping the said agentand water at the top end of the container separated at all times, and a strainer in the bottom'end of said container about said discharge opening.

5. A sterilizing attachment for water supply pipes, comprising a casing adapted to be interposed in a water supply line and to form a part thereof, means providing a container within the casing for a sterilizing agent, while at the same time permitting a free flow of water through said casing about the container, which has a small discharge opening at its bottom end, means associated with the top end of the container which is influenced by the water pressure to discharge a part of the sterilizing agent out through the discharge opening, said means keeping the said agent and water at the top end of the container separated at all times, and means for holding a wad of asbestos within the container about the discharge opening, for straining the sterilizing agent passing therethrough.

6. A sterilizing attachment for water supply pipes, comprising a casing adapted to beinterposed in a water supply line and to form a part thereof, means providing a container within the casing for a sterilizing agent, while at the same time permitting a free flow of water through said casing about the container, which has a small discharge opening at its bottom end, a flexible wate1= proof member fixed to the top end of the container for keeping the water separated from the sterilizing agent, said flexible memher being active under the pressure of water when flowing through the casing to discharge a quantity of the agent out through the discharge opening at the bottom end of the container.

7. A; sterilizing attachment for water supply pipes, comprising a casing adapted to be interposed in a; water supply line and to form a part thereof, means providing a container within the casing for a sterilizing agent, while at the same time permitting a free flow of water through said casing about the container, which has a small discharge opening at its bottom end, a water-proof bag removably attached to the top end of the container for keeping the water separated from the sterilizing agent, said bag being active under the pressure of the water when flowing through the casing to discharge a quantity of the agent out through the discharge opening at the bottom end of the container.

8. A device of the character described, comprising a tubular casing, top and bottom caps therefor, a container within the casing, said container being open at its top end and closed at its bottomend, said b0t-, In testimony that I plain the i'qlfegoing ns tom end resting on the bottom ,cap of the; my invention, I affix my signatnre in the 10 casing and having a recess therein and a presence of two witnesses' thi sfl2Qth day of small discharge opening, a strainer in said Deeembe r,,A..D. 1921-.

recess, means for holding the container in S. spaced, relation with respect to the casing Witnesses: and a Water-proof bag removably attached. CLAREXCE E. M L Q t0 the top end of said container. T. H. ALEREDS, 

